An HIV-positive man injected his wife with his own blood while she slept, infecting her with the virus that causes Aids.
It is believed the man wanted to give her the disease so she would start having sex with him again. She told police he also hoped it would prevent her from finding another man and leaving him.
The man, 35, admitted infecting his wife, in the first case of its kind in New Zealand. In other cases, HIV-positive people have infected others through unprotected sex.
The man has been remanded in prison awaiting sentence for wilfully infecting another with a disease, an offence that carries a maximum 14 years' imprisonment. The pair cannot be identified.